Passive lock cylinder with intelligent state detection function
By using a piezoelectric sensor to convert the mechanical stress of the key into an electrical signal in the passive lock core, combining the control system and the light-emitting ring buzzer, real-time monitoring and reminding of the lock status is achieved, and the power and safety problems of the charging smart lock are solved, and the durability and safety of the lock are improved.
Patent Information
- Application Number
- CN202422358581.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-26
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-09-26
AI Technical Summary
The existing rechargeable smart locks and their supporting equipment have shortcomings in power supply mode and safety performance. During use, users may be unable to distinguish the key status due to incorrect key selection, incomplete insertion or wear, resulting in damage to the lock core or key, and there is a risk of safety information leakage.
A passive lock core with intelligent state detection is designed, and the mechanical stress when the key is inserted is converted into electrical signals using a piezoelectric sensor. The key state is judged through the control system, and the user is prompted in real time through the light ring and the buzzer to monitor and remind the working status of the lock.
Provide temporary power supply without external power supply, improve lock durability, enhance safety, reduce labor and material consumption, provide timely and intuitive usage feedback, and improve user experience.
Smart Images
Figure CN223089086U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of intelligent lock cores, in particular to a passive lock core for intelligent state detection. Background Art
[0002] With the progress of technology and the increasing popularity of smart homes, smart locks, as a key component of modern home security, are gradually replacing traditional mechanical locks and becoming the mainstream choice in the market. However, the current rechargeable smart locks and their supporting devices still have obvious deficiencies in power supply modes and security performance.
[0003] A piezoelectric sensor is a sensor that uses the properties of piezoelectric materials to convert mechanical stress (such as pressure, strain, vibration, or acceleration) into an electrical signal. The piezoelectric effect is the basis for the operation of piezoelectric sensors. It refers to the phenomenon that certain materials generate charges on their surfaces when subjected to mechanical stress. The accumulation of these charges forms an electric potential difference, i.e., voltage, across the material ends. This voltage can be measured, and its magnitude is proportional to the applied pressure. By measuring this voltage, the magnitude of the mechanical stress applied to the piezoelectric material can be inferred. Due to its high sensitivity, fast response, and wide frequency band characteristics, piezoelectric sensors have a wide range of applications in many fields.
[0004] In the combined device of traditional mechanical unlocking methods and intelligent lock cores, although the security performance of the lock is enhanced, during the process of using the key by the user, there may be a situation where the key does not match the lock core due to incorrect key selection, incomplete key insertion, or wear of the key teeth, resulting in the inability to identify the working state of the key. Forcing the lock to open may cause damage to the lock core or the key. Additionally, some users may leave the key on the lock after unlocking, causing the leakage of security information.
[0005] Therefore, it is urgent to design an intelligent passive lock core based on piezoelectric sensors to detect the working state of the lock and prevent potential safety hazards. Summary of the Utility Model
[0006] The main purpose of the present utility model is to provide a passive lock core for intelligent state detection, which solves the problems of monitoring the working state of the passive lock core and providing real-time reminders to users.
[0007] To solve the above technical problems, the technical solution adopted by the present utility model is: a passive lock core for intelligent state detection. Inside the lock core housing, there is a lock core. A cavity is formed between the protective shell below the lock core housing and the lower surface of the lock core housing. Inside the cavity, there are a mother and son lock bolt, a control system, and a pin. The pin and the mother and son lock bolt pass through the lock core housing and extend into the lock core to jointly control the rotation of the lock core. The multiple mother and son lock columns inside the mother and son lock bolt are adapted to the key tooth structure. A piezoelectric sensor is provided at the lower end of each mother and son lock bolt. The piezoelectric sensor is electrically connected to the control system to provide temporary power supply and conduct signal exchange.
[0008] The front end of the lock core housing is also provided with a light-emitting ring and a buzzer electrically connected to the control system, which are used to prompt the working state of the lock core.
[0009] In a preferred embodiment, the structure of the mother-and-son lock bolt is as follows: a plurality of mother-and-son lock columns are arranged inside the mother-and-son mounting seat. The upper ends of the mother-and-son lock columns pass through the lock core housing and extend into the keyhole inside the lock core. A piezoelectric sensor is arranged below each mother-and-son lock column, and the lower end of the mother-and-son lock column is connected to the piezoelectric sensor through a first spring.
[0010] In a preferred embodiment, the pin is sleeved inside the magnet seat. A second spring is arranged between the bottom end of the pin and the inner bottom of the magnet seat. A pin hole is arranged at the corresponding position of the rear end of the lock core. The end of the pin passes through the bottom of the lock core housing and is inserted into the pin hole;
[0011] The control system is electrically connected to the magnet seat, and controls the magnet seat to drive the pin to move downward and disengage from the pin hole.
[0012] In a preferred embodiment, the key tooth part is sequentially provided with a plurality of different engaging teeth, and different engaging teeth are adapted to the heights of different mother-and-son lock columns;
[0013] When the key is inserted into the keyhole of the lock core, the engaging teeth abut against the upper ends of the mother-and-son lock columns, driving the mother-and-son lock columns to move downward to the corresponding positions, and releasing the locking of the mother-and-son lock bolt on the rotation of the lock core.
[0014] In a preferred embodiment, the control system is arranged inside the protective shell and below the mother-and-son lock bolt, which is used to convert the mechanical stress of the downward movement of the mother-and-son lock column into an electrical signal, provide temporary power for the outside world, verify and compare the stress information at the same time, and control the light-emitting ring and the buzzer to emit corresponding sound and light warning signals.
[0015] In a preferred embodiment, the light-emitting ring is arranged at the front end of the lock core housing and around the lock core, and is exposed on the panel when installed together with the whole lock, and is used to emit different light signals in different working states of the lock.
[0016] In a preferred embodiment, the buzzer is arranged at the front end of the protective shell below the lock core, and is used to emit a sound signal warning for the special working state of the lock.
[0017] In a preferred embodiment, a circular groove is also arranged at one end of the lock core, a circular through groove is arranged at the corresponding position of the lock core housing, and the inner and outer circles of the limiting ring are respectively arranged in the circular groove and the circular through groove to axially limit the lock core.
[0018] In a preferred embodiment, the end of the lock core is connected to the lock tongue.
[0019] In a preferred embodiment, a hanging hole is arranged at the top end of the key handle.
[0020] The utility model provides a passive lock cylinder for intelligent state detection. When a key is inserted into the lock cylinder, the tooth part of the key drives the mother-child lock column to move downward, and transfers different pressures to the piezoelectric sensor. The piezoelectric sensor converts mechanical pressure into electrical energy, and transfers multi-point pressure information to the control system. After the control system determines that it is the correct key and at the correct position, it drives the magnet seat to adsorb the pin column to retract, and both the pin column and the mother-child lock bolt release the locking of the lock cylinder, realizing the rotational unlocking of the lock cylinder.
[0021] The piezoelectric sensor converts the mechanical stress generated by inserting the key into an electrical signal, providing a temporary power supply for the passive lock cylinder. At the same time, the highly sensitive piezoelectric sensor can determine the situations of the key being in the correct position, non-correct position, rotating for unlocking, and possibly being missed due to no action for a long time in the lock cylinder through stress changes. Through the control system, it sends corresponding prompts to the light-emitting ring and the buzzer to the user, solving the problems of monitoring the working state of the passive lock cylinder and real-time reminding the user. Brief Description of the Drawings
[0022] The following further describes the present utility model in conjunction with the drawings and embodiments:
[0023] Figure 1 is the overall external structure diagram of the present utility model;
[0024] Figure 2 is the overall external sectional structure diagram of the present utility model;
[0025] Figure 3 is the partial sectional structure diagram of the present utility model in the explosion mode;
[0026] Figure 4 is the structure diagram of the key and the mother-child lock bolt of the present utility model.
[0027] In the figure: lock cylinder housing 1; lock cylinder 2; pin hole 201; protective shell 3; mother-child lock bolt 4; mother-child lock column 401; mother-child mounting seat 402; first spring 403; control system 5; pin column 6; key 7; hanging hole 701; piezoelectric sensor 8; light-emitting ring 9; buzzer 10; magnet seat 11; second spring 12; limit ring 13; lock tongue 14. Detailed Description of the Preferred Embodiments
[0028] Embodiment 1
[0029] As Figures 1 to 4As shown in the figure, there is a passive lock cylinder for intelligent status detection. Inside the lock cylinder housing 1, there is a lock cylinder 2. Below the lock cylinder housing 1, a protective case 3 forms a cavity with the lower surface of the lock cylinder housing 1. Inside the cavity, there are a mother-and-son lock bolt 4, a control system 5, and a pin 6. The pin 6 and the mother-and-son lock bolt 4 pass through the lock cylinder housing 1 and extend into the lock cylinder 2 to jointly control the rotation of the lock cylinder 2. A plurality of mother-and-son lock posts 401 inside the mother-and-son lock bolt 4 are adapted to the tooth structure of the key 7. At the lower end of each mother-and-son lock bolt 4, there is a piezoelectric sensor 8, and the piezoelectric sensor 8 is electrically connected to the control system 5 to provide temporary power and conduct signal exchange;
[0030] At the front end of the lock cylinder housing 1, there is also a light-emitting ring 9 and a buzzer 10 electrically connected to the control system 5, which are used to prompt the working state of the lock cylinder 2.
[0031] In this application, using the piezoelectric effect of the piezoelectric sensor, when the key 7 is inserted into the lock cylinder 2, the tooth part of the key 7 drives the mother-and-son lock post 401 to move downward. Different teeth transmit different pressures to the piezoelectric sensor 8. The piezoelectric sensor 8 converts mechanical pressure into electrical energy to provide temporary power to the outside, and at the same time transmits multi-point pressure information to the control system 5. After the control system 5 determines that the key 7 is correct and at the correct position, it drives the magnet seat 11 to adsorb the pin 6 to retract. The pin 6 and the mother-and-son lock bolt 4 both release the locking of the lock cylinder 2, realizing the rotational unlocking of the lock cylinder 2.
[0032] Neither the lock cylinder 2 nor the key 7 needs to be configured with an external power supply, which improves the overall durability of the lock. There is no need to replace the power supply or charge, reducing subsequent labor and material consumption.
[0033] Specifically, the magnet seat 11 adopts an annular structure. The pin 6 is sleeved in the middle of the magnet seat 11. When the magnet seat 11 is energized, it generates a magnetic suction force to drive the pin 6 to move downward. When not energized, the magnet seat 11 exerts a downward adsorption force on the pin 6, and the second spring 12 jacks up the pin 6 and inserts it into the pin hole 201 to lock the lock cylinder 2.
[0034] In a preferred solution, the structure of the mother-and-son lock bolt 4 is: inside the mother-and-son mounting seat 402, there are a plurality of mother-and-son lock posts 401. The upper ends of the mother-and-son lock posts 401 pass through the lock cylinder housing 1 and extend into the key hole of the lock cylinder 2. Below each mother-and-son lock post 401, there is a piezoelectric sensor 8. The lower end of the mother-and-son lock post 401 is connected to the piezoelectric sensor 8 through a first spring 403.
[0035] Only through the precise cooperation between the mother-and-son lock post 401 and the tooth part of the key 7 can the mother-and-son lock bolt 4 release the locking of the lock cylinder 2. Combined with the pin 6, they jointly lock the lock cylinder 2. This dual unlocking mechanism improves the security of the lock cylinder. Even if a third party activates the magnet seat 11 through external specific electromagnetic means to unlock the locking of the pin 6, the mother-and-son lock bolt 4 still maintains the mechanical locking of the lock cylinder 2.
[0036] In a preferred embodiment, the pin post 6 is sleeved inside the magnet seat 11. A second spring 12 is provided between the bottom end of the pin post 6 and the inner bottom of the magnet seat 11. A pin hole 201 is provided at the corresponding position of the rear end of the lock core 2. The end of the pin post 6 passes through the bottom of the lock core housing 1 and is inserted into the pin hole 201.
[0037] The control system 5 is electrically connected to the magnet seat 11 to control the magnet seat 11 to drive the pin post 6 to move downward and disengage from the pin hole 201.
[0038] In a preferred embodiment, the tooth part of the key 7 is successively provided with a plurality of different engaging teeth, and the different engaging teeth are adapted to the heights of different mother-daughter lock posts 401.
[0039] When the key is inserted into the keyhole of the lock core 2, the engaging teeth abut against the upper end of the mother-daughter lock post 401, driving the mother-daughter lock post 401 to move downward to the corresponding position, releasing the locking of the mother-daughter lock bolt 4 on the rotation of the lock core 2.
[0040] In a preferred embodiment, the control system 5 is arranged inside the protective shell 3 and below the mother-daughter lock bolt 4, and is used to convert the mechanical stress of the downward movement of the mother-daughter lock post 401 into an electrical signal to provide a temporary power source for the outside world. At the same time, it verifies and compares the stress information, and controls the light-emitting ring 9 and the buzzer 10 to emit corresponding sound and light warning signals.
[0041] In a preferred embodiment, the light-emitting ring 9 is arranged at the front end of the lock core housing 1 and around the lock core 2, and is exposed on the panel when installed together with the whole lock, and is used to emit different light signals in different working states of the lock.
[0042] In a preferred embodiment, the buzzer 10 is arranged at the front end of the protective shell 3 below the lock core 2, and is used to emit a sound signal warning for the special working state of the lock.
[0043] Specifically, when the mechanical pressures received by the plurality of piezoelectric sensors 8 change corresponding to the order in which the engaging teeth of the key 7 enter, and finally stop at the stress parameters corresponding to unlocking, it is determined that the lock is in the "unlocking" state. The control system 5 drives the pin post 6 to unlock and controls the light-emitting ring 9 to emit a green light.
[0044] When the plurality of piezoelectric sensors 8 detect that the key 7 has been unlocked and at the same time detect that the key 7 is rotating, it is determined that the lock is in the "unlocking" state. The control system 5 controls the pin post 6 to remain in the unlocked state and controls the light-emitting ring 9 to emit a green light.
[0045] When the plurality of piezoelectric sensors 8 detect that the key 7 has completed rotation after being in the "unlocking" and "unlocking" states, it is determined that the lock is in the "unlocked" state. The control system 5 controls the pin post 6 to remain in the unlocked state, controls the light-emitting ring 9 to emit a green light or blink a green light, and the buzzer 10 emits a prompt that the lock has been opened.
[0046] When multiple piezoelectric sensors 8 detect a change in mechanical stress, that is, the key 7 is being inserted, but it does not match the stress parameters corresponding to unlocking, and the master and slave lock bolts 4 are in an unlocked state, the control system 5 controls the pin 6 to remain locked and controls the light-emitting ring 9 to emit yellow light, prompting the user that the lock is in the "wrong key" state;
[0047] When multiple piezoelectric sensors 8 detect a constant mechanical stress for a long time, that is, the key 7 or other foreign objects remain motionless in the lock core 2 for a long time, the control system 5 controls the light-emitting ring 9 to emit red light, and the buzzer 10 gives an alarm to prompt the user that the lock is in the "forgotten key" or "foreign object in the lock core" state.
[0048] By setting the light-emitting ring 9 and the buzzer 10 in a position that is easy to intuitively touch, it is convenient for the user to obtain the working state information of the lock core 2 in real time, or receive a warning in the case of forgetting the key 7, improving the safety of key use, providing the user with timely and intuitive use feedback, and improving the comfort of the lock during use.
[0049] In a preferred embodiment, a circular groove is further provided at one end of the lock core 2, and a circular through groove is provided at the corresponding position of the lock core housing 1. The inner and outer circles of the limit ring 13 are respectively arranged in the circular groove and the circular through groove to axially limit the lock core 2.
[0050] In a preferred embodiment, the end of the lock core 2 is connected to the lock tongue 14.
[0051] In a preferred embodiment, a hanging hole 701 is provided at the top of the handle of the key 7.
[0052] The above embodiments are only the preferred technical solutions of the present invention and should not be regarded as limitations on the present invention. The protection scope of the present invention should be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.
Claims
1. A passive lock cylinder for intelligent status detection, characterized in that: Inside the lock cylinder housing (1), there is a lock cylinder (2). Below the lock cylinder housing (1), the protective case (3) and the lower surface of the lock cylinder housing (1) form a cavity. Inside the cavity, there are a mother - son lock bolt (4), a control system (5), and a pin (6). The pin (6) and the mother - son lock bolt (4) pass through the lock cylinder housing (1) and extend into the inside of the lock cylinder (2) to jointly control the rotation of the lock cylinder (2). Multiple mother - son lock posts (401) inside the mother - son lock bolt (4) are adapted to the tooth structure of the key (7). At the lower end of each mother - son lock bolt (4), there is a piezoelectric sensor (8), and the piezoelectric sensor (8) is electrically connected to the control system (5) to provide temporary power and conduct signal exchange; At the front end of the lock cylinder housing (1), there are also a light - emitting ring (9) and a buzzer (10) electrically connected to the control system (5) for indicating the working state of the lock cylinder (2).
2. The passive lock cylinder for intelligent status detection according to claim 1, wherein: The structure of the mother - son lock bolt (4) is as follows: Inside the mother - son mounting seat (402), there are multiple mother - son lock posts (401). The upper ends of the mother - son lock posts (401) pass through the lock cylinder housing (1) and extend into the keyhole of the lock cylinder (2). Below each mother - son lock post (401), there is a piezoelectric sensor (8), and the lower end of the mother - son lock post (401) is connected to the piezoelectric sensor (8) through a first spring (403).
3. The passive lock cylinder for intelligent status detection according to claim 1, wherein: The pin (6) is sleeved inside the magnet seat (11). Between the bottom end of the pin (6) and the inner bottom of the magnet seat (11), there is a second spring (12). At the corresponding position at the rear end of the lock cylinder (2), there is a pin hole (201). The end of the pin (6) passes through the bottom of the lock cylinder housing (1) and is inserted into the pin hole (201); The control system (5) is electrically connected to the magnet seat (11) to control the magnet seat (11) to drive the pin (6) to move downward and disengage from the pin hole (201).
4. The passive lock cylinder for intelligent status detection according to claim 1, wherein: the key The tooth part of the (7) has multiple different teeth in sequence, and different teeth are adapted to the heights of different mother - son lock posts (401); When the key is inserted into the keyhole of the lock cylinder (2), the teeth abut against the upper ends of the mother - son lock posts (401), driving the mother - son lock posts (401) to move downward to the corresponding positions, releasing the locking of the mother - son lock bolt (4) on the rotation of the lock cylinder (2).
5. The passive lock cylinder for intelligent status detection according to claim 1, wherein: The control system (5) is arranged inside the protective case (3) and below the mother - son lock bolt (4), used to convert the mechanical stress of the downward movement of the mother - son lock post (401) into an electrical signal, provide temporary power for the outside world, and at the same time verify and compare the stress information, and control the light - emitting ring (9) and the buzzer (10) to emit corresponding sound and light warning signals.
6. The passive lock cylinder for intelligent status detection according to claim 1, characterized in that: The light - emitting ring (9) is arranged at the front end of the lock cylinder housing (1) and around the lock cylinder (2), and is exposed on the panel when installed together with the whole lock, used to emit different light signals in different working states of the lock.
7. The passive lock cylinder for intelligent status detection according to claim 1, characterized in that: The buzzer (10) is arranged at the front end of the protective case (3) below the lock cylinder (2), used to emit a sound signal warning for the special working state of the lock.
8. The passive lock cylinder for intelligent state detection according to claim 1, characterized in that: One end of the lock cylinder (2) is also provided with an annular groove, and at the corresponding position of the lock cylinder housing (1), there is an annular through - groove. The inner and outer circles of the limiting ring (13) are respectively arranged in the annular groove and the annular through - groove to axially limit the lock cylinder (2).
9. The passive lock cylinder for intelligent status detection according to claim 1, characterized in that: The end of the lock cylinder (2) is connected to the lock tongue (14).
10. The passive lock cylinder for intelligent state detection according to claim 1, characterized in that: At the top of the handle of the key (7), there is a hanging hole (701).